Source code: org/progeeks/meta/util/CompositeMetaKit.java
1 /*
2 * $Id: CompositeMetaKit.java,v 1.2 2003/08/16 03:44:40 pspeed Exp $
3 *
4 * Copyright (c) 2001-2003, Paul Speed
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * 2) Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3) Neither the names "Progeeks", "Meta-JB", nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 package org.progeeks.meta.util;
34
35 import java.beans.*;
36 import java.lang.reflect.*;
37 import java.util.*;
38
39 import org.progeeks.meta.*;
40 import org.progeeks.util.*;
41 import org.progeeks.util.beans.*;
42
43 /**
44 * MetaKit implementation combining one or more other
45 * meta-kit implementations to support compositing meta-objects.
46 *
47 * @version $Revision: 1.2 $
48 * @author Paul Speed
49 */
50 public class CompositeMetaKit implements MetaKit
51 {
52 /**
53 * Returns the internal object representation for the specified
54 * meta-object if one exists. For meta-object implementations that
55 * wrap an internal object, this will return the internal object.
56 * null is returned if the meta-object implementation does not
57 * internally wrap real objects.
58 */
59 public Object getInternalObject( MetaObject object )
60 {
61 return( null );
62 }
63
64 /**
65 * Returns the appropriate meta-class for the specified object.
66 * If an appropriate meta-class has not been registered then
67 * this method returns null.
68 */
69 public MetaClass getMetaClassForObject( Object object, MetaClassRegistry classRegistry )
70 {
71 return( null );
72 }
73
74 /**
75 * Returns the appropriate meta-class for the specified object.
76 * If an appropriate meta-class has not been registered then
77 * this method returns null. The meta-class is looked up in the root
78 * class registry.
79 */
80 public MetaClass getMetaClassForObject( Object object )
81 {
82 return( getMetaClassForObject( object, MetaClassRegistry.getRootRegistry() ) );
83 }
84
85 /**
86 * Wraps the specified object in a meta-object adapter specific
87 * to this kit's implementation layer. Returns null if the object
88 * cannot be wrapped. Throws UnsupportedOperationException if this
89 * kit doesn't support wrapping.
90 */
91 public MetaObject wrapObject( Object object, MetaClass mClass )
92 {
93 return( null );
94 }
95
96 /**
97 * Returns a factory that can be used to create new MetaObject
98 * based values using this kit's underlying implementation.
99 */
100 public MetaObjectFactory getMetaObjectFactory()
101 {
102 return( new CompositeMetaObjectFactory() );
103 }
104
105 private static class CompositeMetaObjectFactory implements MetaObjectFactory
106 {
107 /**
108 * Creates a new uninitialized meta-object for the specified
109 * meta-class.
110 */
111 public MetaObject createMetaObject( MetaClass type )
112 {
113 // Create an object for each of the separate
114 // meta-classes from the separate meta-kits.
115 return( null );
116 }
117 }
118 }
119